Unit 2 Materials and Components - Modern materials and products Flashcards

1
Q

What are thermo-ceramics?

A

advanced ceramic materials that have characteristics that make them useful in specialist engineering

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2
Q

What are the applications for thermo-ceramics?

A

jet engines
turbine blades
turbo chargers in cars

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3
Q

What are the advantages of thermo-ceramics?

A
  • good in high temperatures
  • good stability
  • strength
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4
Q

What are the disadvantages of thermo-ceramics?

A

brittle

can crack or break

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5
Q

What is photochromic glass?

A

glass that automatically gets darker in ultraviolet light

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6
Q

How is photochromic glass made?

A

impregnated with the chemical silver halide and encapsulated and sealed within the glass to make it reversible

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7
Q

What are solar panels?

A

photovoltaic or solar cells that can generate electricity

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8
Q

How are solar panels constructed?

A

Thin layers of silicon that have had various impurities added.

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9
Q

How do solar panels work?

A

Cells are exposed to sunlight
one layer becomes electron rich, another becomes electron deficient
electron flow is set up between the two layers creating a voltage

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10
Q

What are the advantages of solar panels?

A

renewable energy source

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11
Q

What are the disadvantages of solar panels?

A

Only a low electrical voltage created so large numbers of cells needed
cost of manufacture and installation is high

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